﻿function fileQueueError(file, errorCode, message) {
    var errorMsg = "";
    try {                                        
        var imageName = "error.gif";
        var errorName = "";
        if (errorCode === SWFUpload.errorCode_QUEUE_LIMIT_EXCEEDED) {
            errorName = "您将要上传的文件数量太多.";
        }

        if (errorName !== "") {
            alert(errorName);
            return;
        }
        
        switch (errorCode) {
            case SWFUpload.QUEUE_ERROR.ZERO_BYTE_FILE:
                {
                    errorMsg = "该文件大小为0;";
                    imageName = "zerobyte.gif";
                    break;
                }
            case SWFUpload.QUEUE_ERROR.FILE_EXCEEDS_SIZE_LIMIT:
                {
                    errorMsg = "该文件太大";
                    imageName = "toobig.gif";
                    break;
                }
            case SWFUpload.QUEUE_ERROR.ZERO_BYTE_FILE:
            case SWFUpload.QUEUE_ERROR.INVALID_FILETYPE:
            default:
                {
                    errorMsg ="error:"+ message;
                    //alert(message);
                    break;
                }
        }

        var progress = new FileProgress(file, this.customSettings.upload_target);
        progress.setStatus(errorMsg);
        progress.toggleCancel(false);
        updateFileInfo(file);
        
        addImage("/swf/images/" + imageName);

    } catch (ex) {
        this.debug(ex);
    }

}

function fileDialogComplete(numFilesSelected, numFilesQueued) {
    try {           
        if (numFilesQueued > 0) {
            this.startUpload();
        }
    } catch (ex) {
        this.debug(ex);
    }
}
function uploadStart(file) {
    try {
        updateFileInfo(file);
    }
    catch (ex) {
        this.debug(ex);
    }

}

function uploadProgress(file, bytesLoaded) {

    try {
        var percent = Math.ceil((bytesLoaded / file.size) * 100);

        var progress = new FileProgress(file, this.customSettings.upload_target);
        progress.setProgress(percent);
        if (percent === 100) {
            progress.setStatus("正在显示...");
            progress.toggleCancel(false, this);
        } else {
            progress.setStatus("正在上传...");
            progress.toggleCancel(true, this);
        }
    } catch (ex) {
        this.debug(ex);
    }
}

function uploadSuccess(file, serverData) {
    try {
        addImage("/swf/thumbnail.aspx?id=" + serverData);

        var progress = new FileProgress(file, this.customSettings.upload_target);

        progress.setStatus("显示成功...");
        progress.toggleCancel(false);


    } catch (ex) {
        this.debug(ex);
    }
}

function uploadComplete(file) {
    try { 
        /*  I want the next upload to continue automatically so I'll call startUpload here */
        if (this.getStats().files_queued > 0) {
            this.startUpload();
        } else {
            var progress = new FileProgress(file, this.customSettings.upload_target);
            progress.setComplete();
            progress.setStatus("上传成功！" );
            progress.toggleCancel(false);
        }
    } catch (ex) {
        this.debug(ex);
    }
}

function uploadError(file, errorCode, message) {
    var imageName = "error.gif";
    var progress;
    try {      
        switch (errorCode) {
            case SWFUpload.UPLOAD_ERROR.FILE_CANCELLED:
                try {
                    progress = new FileProgress(file, this.customSettings.upload_target);
                    progress.setCancelled();
                    progress.setStatus("已取消");
                    progress.toggleCancel(false);
                }
                catch (ex1) {
                    this.debug(ex1);
                }
                break;
            case SWFUpload.UPLOAD_ERROR.UPLOAD_STOPPED:
                try {
                    progress = new FileProgress(file, this.customSettings.upload_target);
                    progress.setCancelled();
                    progress.setStatus("已停止");
                    progress.toggleCancel(true);
                }
                catch (ex2) {
                    this.debug(ex2);
                }
            case SWFUpload.UPLOAD_ERROR.UPLOAD_LIMIT_EXCEEDED:
                imageName = "uploadlimit.gif";
                break;
            default:
                alert(message);
                break;
        }

        addImage("/swf/images/" + imageName);

    } catch (ex3) {
        this.debug(ex3);
    }

}


function addImage(src) {
    var newImg = document.createElement("img");
    newImg.style.margin = "5px";   
    document.getElementById("thumbnails").innerHTML = "";
    document.getElementById("thumbnails").appendChild(newImg);

    newImg.style.width = "100px";
    newImg.style.height = "100px";
    if (newImg.filters) {
        try {
            newImg.filters.item("DXImageTransform.Microsoft.Alpha").opacity = 0;
        } catch (e) {
            // If it is not set initially, the browser will throw an error.  This will set it if it is not set yet.
            newImg.style.filter = 'progid:DXImageTransform.Microsoft.Alpha(opacity=' + 0 + ')';
        }
    } else {
        newImg.style.opacity = 0;
    }

    newImg.onload = function() {
        fadeIn(newImg, 0);
    };
    newImg.src = src;
}
function updateFileInfo(file) {
    //文件大小
    document.getElementById("FileSizeDiv").innerHTML = ((Math.ceil(file.size / 1024 * 100)) / 100) + "KB";
}

function fadeIn(element, opacity) {
    var reduceOpacityBy = 5;
    var rate = 30; // 15 fps


    if (opacity < 100) {
        opacity += reduceOpacityBy;
        if (opacity > 100) {
            opacity = 100;
        }

        if (element.filters) {
            try {
                element.filters.item("DXImageTransform.Microsoft.Alpha").opacity = opacity;
            } catch (e) {
                // If it is not set initially, the browser will throw an error.  This will set it if it is not set yet.
                element.style.filter = 'progid:DXImageTransform.Microsoft.Alpha(opacity=' + opacity + ')';
            }
        } else {
            element.style.opacity = opacity / 100;
        }
    }

    if (opacity < 100) {
        setTimeout(function() {
            fadeIn(element, opacity);
        }, rate);
    }
}



/* ******************************************
*	FileProgress Object
*	Control object for displaying file info
* ****************************************** */

function FileProgress(file, targetID) {
    this.fileProgressID = "divFileProgress";

    this.fileProgressWrapper = document.getElementById(this.fileProgressID);
    if (!this.fileProgressWrapper) {
        this.fileProgressWrapper = document.createElement("div");
        this.fileProgressWrapper.className = "progressWrapper";
        this.fileProgressWrapper.id = this.fileProgressID;

        this.fileProgressElement = document.createElement("div");
        this.fileProgressElement.className = "progressContainer";

        var progressCancel = document.createElement("a");
        progressCancel.className = "progressCancel";
        progressCancel.href = "#";
        progressCancel.style.visibility = "hidden";
        progressCancel.appendChild(document.createTextNode(" "));

        var progressText = document.createElement("div");
        progressText.className = "progressName";
        progressText.appendChild(document.createTextNode(file.name));

        var progressBar = document.createElement("div");
        progressBar.className = "progressBarInProgress";

        var progressStatus = document.createElement("div");
        progressStatus.className = "progressBarStatus";
        progressStatus.innerHTML = "&nbsp;";

        this.fileProgressElement.appendChild(progressCancel);
        this.fileProgressElement.appendChild(progressText);
        this.fileProgressElement.appendChild(progressStatus);
        this.fileProgressElement.appendChild(progressBar);

        this.fileProgressWrapper.appendChild(this.fileProgressElement);

        document.getElementById(targetID).appendChild(this.fileProgressWrapper);
        fadeIn(this.fileProgressWrapper, 0);

    } else {
        this.fileProgressElement = this.fileProgressWrapper.firstChild;
        this.fileProgressElement.childNodes[1].firstChild.nodeValue = file.name;
    }

    this.height = this.fileProgressWrapper.offsetHeight;

}
FileProgress.prototype.setProgress = function(percentage) {
    this.fileProgressElement.className = "progressContainer green";
    this.fileProgressElement.childNodes[3].className = "progressBarInProgress";
    this.fileProgressElement.childNodes[3].style.width = percentage + "%";
};
FileProgress.prototype.setComplete = function() {
    this.fileProgressElement.className = "progressContainer blue";
    this.fileProgressElement.childNodes[3].className = "progressBarComplete";
    this.fileProgressElement.childNodes[3].style.width = "";

};
FileProgress.prototype.setError = function() {
    this.fileProgressElement.className = "progressContainer red";
    this.fileProgressElement.childNodes[3].className = "progressBarError";
    this.fileProgressElement.childNodes[3].style.width = "";

};
FileProgress.prototype.setCancelled = function() {
    this.fileProgressElement.className = "progressContainer";
    this.fileProgressElement.childNodes[3].className = "progressBarError";
    this.fileProgressElement.childNodes[3].style.width = "";

};
FileProgress.prototype.setStatus = function(status) {
    this.fileProgressElement.childNodes[2].innerHTML = status;
};

FileProgress.prototype.toggleCancel = function(show, swfuploadInstance) {
    this.fileProgressElement.childNodes[0].style.visibility = show ? "visible" : "hidden";
    if (swfuploadInstance) {
        var fileID = this.fileProgressID;
        this.fileProgressElement.childNodes[0].onclick = function() {
            swfuploadInstance.cancelUpload(fileID);
            return false;
        };
    }
};
